SEXUALLY TRANSMITTED DISEASES (STDs):
The diseases which are primarily transmitted through sexual intercourse are called sexually transmitted diseases (STD) or venereal diseases (VD) or reproductive tract infections (RTI). STDs are found across all age groups but are more prevalent in organisms of age 15-24 years.
Examples:
Bacterial STD diseases: Gonorrhoea, Syphilis, Chlamydiosis.
Protozoan STD diseases: Trichomoniasis.
Viral STD diseases: AIDS, Genital herpes, Genital warts, Hepatitis, etc.